Temper-screw clamp.



P. S. HOVIS. .TEMPER SCREW CLAMP. APPLICATION man MAR. s. 1917'.

1,43 Patented Oct. 16, 1917.

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PARK S. HOVIS, OIF WOOSTER, OHIO, ASSIGNOR OF FORTY-FIVE ONE-HUNDREDTHS TO CHARLES CURRY, OF WOOSTER, OHIO.

rampart-SCREW CLAMP.

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Specification of Letterslatent.

Patented We. is, 1917.

Application mew/Larch e, 1917. Serial No. 152,913.

To all whom it may concern Be it known thatI, PARK S. HovIs, a citizen of the UnitedStates, residing at Wooster, inthe countyof Wayne and State of Ohio, have invented a new and useful Temper-Screw Clamp, of which thefollowing is j a specification.

i inventlon relatestoimprovements 1n te1nper-sorew clamps for well-drilling mechanisms. Its principal object is to provide improved meansffol" clamping wire cables employed in drilling oil, gas, and Artesian wells, and particularly for clamping more securely the cable which actuates the drill a tool, and for quickly releasing such cable in case of tire or other emergency, and for shifting position of the clamp thereon intermittently, as required. during the drilling process.

lit consists of the novel means and combination of elements employed by me to ac- I complish said objects, as hereinafter fully set forth and as stated in the appended to release its grip on the cable; Fig. 3 is a detail view of a portionof the clamp actuating mechanism, detached; and Fig. 4: is a side longitudinal view of one of my cablegripping slips, detached.

In the drawings, A, B and C are the fulcrum-axis and pair of lever-arms which constitute the clamp body; D indicates a pair of gripping slips, which are setopposite each other between the adjacent jaws of the clamp transversely, said slips each having a pair of longitudinal grooves (i d, adaptedto register with the corresponding pair of the opposite slip, so as to engage the wire cable H when passed between them through the orifice formed by their junction; said slips are secured to said adjacent jaws, respectively by means of end lugs e 6, having perforations, as shown in Fig. 4, and threaded ibolts passed therethrough into the clamp body.

f secure said slips nearer to the clamp axis f than heretofore, by cutting a notch-ehown in dotted 1inesin each jaw, and also in the inner adjacent edge of the clamp hinge, thereby increasing the grip power of the clamp upon the cable H when the lever-arms Band (hare drawn toward each other, as hereafter stated.

Said lever-arms B and O are simultaneously actuated in either direction laterally, by the action of'the hand-lever E in connection with the rotary member G, and the bars 9 and it, which pivotally support said memberbetween their outer ends a 41 while their inner ends m m are in operative engagement pivotally with the lower end of the leverarm B, as shown in Fig. 3. Said rotary member G is perforated with a transverse threaded bore fitted to receive and co-act with the threaded lower end F of the hand lever E, said lower end being bent at about right angles with said arm E, and its-outer end. f adapted to impinge against the adjacent lower end of the lever-arm C, and its length regulated by said thread at any desired distance from said rotary member.

The lever-arm C is provided with a catch 0 at its lower end, which is adapted to engage the outer end 7 of said threaded portion F when said rotary member G is actuated in one direction, said bars g and it cooperating therewith in forcing the members B and C toward each other until said outer end f passes the dead point between said bars, as shown in Fig. 1, thereby locking the clamp automatically.

By reversing the movement of the handlever E, the parts are quickly unlocked and drawn apart to the position shown in Fig. 2 whereby the cable H is loosened from the clamp by separation of the gripping slips D; itmay be temporarily held in this open position by the engagement of the outer end 7 of the threaded member F with the catch 0 in cooperation with the bars 9 h,

while the cable H is shifted; and, when desired, the hand-lever B may be drawn back far enough to free the lower end of the lever-arm C from connection with the leverarm B, thereby permitting the clamp to be entirely removed from the cable. The lugs b b, which project from opposite sides of the clamp head, and sections of rings a 0;, indicate the means employed for connecting the clamp with the temper screw of the drilling mechanism and operated in the usual well known way. 

